Linux Android 下如何读取SD卡的ID--读取SD Card ID(SD CID)

使用以下命令：cat /sys/devices/platform/jz-msc.0/mmc_host/mmc0/mmc0:1234/cid或者使用通配符cat /sys/devices/platform/jz-msc.0/mmc_host/mmc0/mmc0:*/cid 得到32个字节的数据：0254 4d53 4130 3847 0610 ebb5 5000 a93f 在kernel/drivers/mmc/core/sd.c文件中：以下数组结构用于保存SD卡ID card->raw_cid[0]card->raw_cid[1]card->raw_cid[2]card->raw_cid[3]linux内核中对应的代码位于： kernel/drivers/mmc/core/sd.ckernel/drivers/mmc/core/mmc.ckernel/include/linux/mmc/card.hkernel/include/linux/mmc/mmc.h 关键字： Linux MMC卡驱动读取SD卡ID如何读取SD卡ID如何获取SD卡ID如何获取SD卡序列号

MODEM的AT命令CID和VCID是设置是不是来电显示的，如果电信开通了来电显示功能

就能通过MODEM来显示对方的电话号码。那么首先设置CID=1或是VCID=1

般来说来电显示的信息为：

DATE = MMDD "来电日期 MMDD

TIME = HHMM "来电时间 HHMM

NMBR = ### "来电号码

程序实现如下,设置MSComm1的相关设置，并建两个Label为Label1和Label2

Function OpenCID(OpenCLose As Boolean) As Boolean

'打开或是关毕来电显示功能

On Error Resume Next

Dim ArrCID(1) As String

ArrCID(0) = "at#cid=" &IIf(openclode, 1, 0)

ArrCID(1) = "at#vcid=" &IIf(openclode, 1, 0)

MSComm1.RThreshold = 0

For i = 0 To 1

MSComm1.Output = ArrCID(i) &vbCr

EndTime = Timer + 0.5

Do While bStop = False

nTemp = nTemp + 1

If MSComm1.InBufferCount >= 2 Then

sTemp = MSComm1.Input

If InStr(sTemp, "OK") = 0 Then

bStop = True

OpenCID = True

Exit Function

End If

End If

If Timer >= EndTime Or ErrorCode Then Exit Do

Loop

Next i

OpenCID = False

MSComm1.RThreshold = 1

End Function

下面的函数显示来电号码并在窗体上的Label1的Label2上显示出来

Private Sub MSComm1_OnComm()

On Error Resume Next

Static Buffer As String

' 收到多于 RThreshold 属性设置的字符数（RThreshold 属性必须大于 0）。

'label1 = "收到" + Str(MSComm1.InBufferCount) + "个字符"

Buffer = Buffer + MSComm1.Input

Buffer = UCase(Buffer)

' Exit Sub

If InStr(1, Buffer, "RING", vbTextCompare) Then

'收到震铃

'Comm1.Output = "ATA" + Chr(13) '命令 Modem 摘机响应

Buffer = "" '清缓冲区字符

'mciExecute "sound " &SystemPath &"\ringin.wav"

Label1 = "状态：收到震铃"

Zhen = True

frmCallID.Show

frmCallID.ChangRing

ElseIf InStr(1, Buffer, "CONNECT", vbTextCompare) Then

'对方应答呼叫

Buffer = "" '清缓冲区字符

Label1 = "状态：已经建立连接"

ElseIf InStr(1, Buffer, "BUSY", vbTextCompare) Then

'对方线路忙

Buffer = "" '清缓冲区字符

Label1 = "状态：对方线路忙"

ElseIf InStr(1, Buffer, "No DIA", vbTextCompare) Then

Buffer = "" '清缓冲区字符

Label1 = "状态：拨出号码错,请检查电话线"

Command1_Click

ElseIf InStr(1, Buffer, "No CARRIER", vbTextCompare) Then

'对方未摘机或未响应

Buffer = "" '清缓冲区字符

Label1 = "状态：对方未摘机"

ElseIf InStr(1, Buffer, "NMBR =", vbTextCompare) Then

tmpStr = InStr(1, Buffer, "NMBR", vbTextCompare)

CallNum = Right(Buffer, Len(Buffer) - lll - 6)

Label2.Caption = "对方电话：" + CallNum

'Buffer = "" '清缓冲区字符

ElseIf InStr(1, Buffer, "OK", vbTextCompare) And Asc(Right(Buffer, 1)) = 10 Then

If Zhen = False Then Buffer = "" '清缓冲区字符

If Command1.Caption = "挂断" Then

Label2.Caption = "状态：已经播通电话：" + txtCallNum

End If

End If

End Sub

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